ChameleonGive instructions to help the chameleon catch all the flies. by facing the chameleon in the right direction and judging the correct 'lick' distance. You can choose to use 'angle help' or 'distance help' if you are having difficulty.http://www.iboard.co.uk/activity/Chameleon-664

Platform Scales"One of the Gregs will drop on the scale, waiting to be weighed. You can weigh Greg by moving the larger and smaller weights to the right or left on the graduated bar. The bottom (larger) weight shows units and the top(smaller) weight shows hundredths of a gram. Move the weights until the bar is level."...http://www.visualfractions.com/scale/platformscale.htm